Sökresultat

Fe-Mn-O magnetic nanocrystals precipitate in a glass system SiO2/Na2O/Fe2O3/MnO during thermal annealing for different periods of time. We report here small angle neutron scattering investigations using polarized neutrons (pSANS) on these glass samples. Analysis of scattering data reveals the formation of spherical core-shell particles. The core of the particle is found to be magnetic and it is su

This paper presents a complete characterization and solution to microphone position self-calibration problem for time-of-arrival (TOA) measurements. This is the problem of determining the positions of receivers and transmitters given all receiver-transmitter distances. Such calibration problems arise in application such as calibration of radio antenna networks, audio or ultra-sound arrays and WiFi

Bluvisions IoT-system har varit huvudfokus under utredningen av om IoT(Internet of Things) är lönsamt att implementera på framtidens Valmetmaskiner. Från början så skulle projektet avgränsas till pressning, kräppning och upprullning men under examensarbetets start fick Valmet svårt att hitta orsaken till varför en ny komponent hade havererat. Havereringen tros ha haft ett samband med höga vibratioBluvision’s IoT-system has been the focus during the investigation if IoT (internet of things) is something that can be implemented on future Valmet machines. From the beginning the bachelor thesis was restricted to press, creping and turn-up. During the initial phase of the bachelor theses start Valmet had problem finding out why a new component had failed. Therefore, it was more valuable for Val

Byggbranschen står inför en digital transformation där teknologier som digitala tvillingar, artificiell intelligens och internet of things börjar implementeras allt mer idag. Genom att skapa en digital modell som kontinuerligt uppdateras med realtidsdata och kopplas samman med fysiska byggnader, möjliggörs det övervakning, analysering och optimering av byggnadens prestanda. Syftet med studien ha

Nondestructive assaying (NDA) is an important step in ensuring the safe handling of spent nuclear fuel and radioactive waste. The assaying techniques require the use of ionizing radiation detectors to determine the activity of said fuel. One candidate detector for such use is the cerium-activated LaBr3 inorganic crystal scintillator. This scintillator offers excellent resolution, decay times and l

Small populations are prone to inbreeding depression due to the increased likelihood of mating between close relatives, resulting in the expression of deleterious recessive mutations. While this increases the risk of population extinction, high levels of inbreeding can initiate a purging process, where natural selection gradually eliminates strongly deleterious mutations. This purging effect has b

The objective of this study was to examine the possibility of measuring the growth of three white-rot fungi in soil contaminated with polycyclic aromatic hydrocarbons (PAHs), by estimating the soil levels of the phospholipid fatty acid (PLFA) 18:2ω6,9. The effect of the fungi on the PAH concentration and on the indigenous bacterial population in the soil was monitored. As shown by visual examinati

DNA-dependent protein kinase (DNA-PK) is a holoenzyme consisting of a regulatory subunit, the heterodimeric Ku70/86, and a catalytic subunit known as DNA-dependent protein kinase catalytic subunit (DNA-PKcs). DNA-PK takes part in a number of cellular functions including growth control, immunoglobulin gene rearrangement and DNA repair. The Ku86 subunit of DNA-PK has been reported to exist in human

The authors sought to non-invasively defect changes in atrial fibrillation rhythm during autonomic provocative maneuvers. Digital Holter from 23 patients with chronic AF before and after active postural change were subjected to routine editing, and then underwent QRS and T wave subtraction, leaving pure atrial fibrillatory records. Spectral analysis by autoregressive method was performed on this r

Unattended Ground Sensor Networks (UGSN) are becoming increasingly popular for surveillance and situational awareness applications. Acoustic sensors can be used in UGSN to detect and to classify targets, and these sensors are cost efficient, easy to deploy, and above all, non-jammable since they are passive. An array of acoustic sensors can detect multiple sound sources and determine the direction

Bakgrund: Barnmorskor i Sverige får i enlighet med Socialstyrelsens självständigt förskriva och ge preventivmedelsrådgivning och förskriva preventivmedel. Vid preventivmedelsrådgivning kan det finnas utmaningar kopplat till rådgivningssituationen och barnmorskan bär ett ansvar att främja sexuella och reproduktiv hälsa. Det finns få studier i en svensk kontext som fokuserar på utländska kvinnors up

Bakgrund: Fluktuerande patientflöden och begränsade resurser är vanliga utmaningar på akutmottagningar världen över. I sådana situationer spelar triage en central roll för att säkerställa rättvis bedömning och prioritering av patienter. Det är därför viktigt att undersöka akutsjuksköterskors upplevelser av triage på akutmottagningen, då det kan belysa potentiella hinder och bidra till förbättringa

This thesis explores whether throat cancer can be detected from voice recordings using statistical methods in the context of mobile health applications. It focuses on two main questions: Can throat cancer be detected from voice recordings? and Which data features and models perform best in this task? To investigate these questions, acoustic features were extracted from patient recordings and analy

Exekutiv funktion är en sammansättning av flera förmågor som är avgörande för ungas möjlighet att hantera krav i skolan och samhället. Studier tyder på att det finns ett samband mellan exekutiv funktion och psykisk ohälsa, däribland ångest, depression och icke-suicidalt självskadebeteende. Tidigare forskning har främst studerat exekutiv funktion utifrån psykologiska test samt undersökt ungdomar meExecutive function refers to a set of skills important for adolescents’ ability to handle school and societal demands. Research has shown associations between executive function and mental health problems, including anxiety, depression and non-suicidal self-injury. However, prior studies have mainly investigated executive function through psychological testing and focused on individuals with concu

Importance Substantial improvements in childhood cancer survival have created a critical need to address serious long-term health complications, such as valvular heart disease (VHD). Objective To identify treatment-related risk factors for VHD in a large European cohort of long-term childhood cancer survivors. Design, Setting, and Participants This nested case-control study used data from the PanC

Background: Opioid substitution treatment (OST) with methadone or buprenorphine is the most effective means of treating opioid dependence. If these substances are used by people who are not undergoing OST, they can however carry serious risks. This article examines the lifetime prevalence, motives, and drug sources for such use, as well as geographical differences in these variables. Methods: Stru

Background and purpose: Real-world data on management and outcomes of patients with simultaneously diagnosed synchronous colorectal liver and lung metastases are limited. This national study evaluated referral patterns, treatment strategies, and survival in a population-based cohort. Patient/material and methods: This retrospective cohort study used Swedish national registries to identify patients